It would be nice if all the logs would contain the instance name of that dhcp server or client, so this would look better:
Server:
21:16:43 dhcp,debug dhcp1 received request [...]
21:16:43 dhcp,debug lease bound, extending <- ???
21:16:43 dhcp,debug dhcp1 on bridge sending ack [...]
DHCPv6 Client:
19:27:38 dhcp,debug,state dhcpc-wan1 on ether1 entering <selecting...> state
19:27:38 dhcp,debug rebinding with any server... <- ???
19:27:39 dhcp,debug send ether1 rebind with id fbd567 -> ff02::1:2%6
19:27:39 dhcp,debug resending.. <- ???
19:27:40 dhcp,debug client on ether1 received reply with id [...]
19:27:40 dhcp,debug handle reply <- ???
19:27:40 dhcp,debug ia_pd: XX:XX:XX:XX::/56- ok, extending <- ???
19:27:40 dhcp,debug ia_na: XX:XX:XX::1- ok, extending <- ???
Thanks.